Roll.



UTET) STATES PATENT OFFICE.

JOSEPH S. SEAMAN, JR., OF PITTSBURGH, PENNSYLVANIA.

ROLL.

To all whom t may concern:

Be it known that I, Josnrn S. Sammie, Jr., residing at Iiittsburgh, in the county of Allegheny and State of Pennsylvania, a citizen ot the United States, have invented or ('liscovered certain new and use'tul Im provements in Rolls, of which improvements the following is a specification.

The invention described herein relates to certain improvements in rolls for reducing ingots, blooms or billets to rails, beams, channels, of other sections, and has tor its object a roll having incorporated in its collars during the casting of the roll, metal rings, which serve during such niaml'taeture to ett'ect a localized cooling o1 the molten metal7 whereby the metal thus affected is rendered more dense.

The invention is hereinafter more fully described and claimed.

In the accompanying drawing forming a part oit this specilication, Figure 1 is a sectional view of a portion ot' my improved roll, and Fig. 2 is a sectional view showing my in'iproved roll with grooves to form rail passes and a collared roll used in connection therewith.

It .is customary in manufacturing grooved rolls to form during the casting of the rolls, grooves approximating in width and depth the dimensions desired in the finished roll. The roll is Iinished by cutting away the metal 'tor a considerable depth along the sido walls and bottoms oit' the preliminary grooves, as will be seen by a comparison of Figs. l and 2, the former showing the grooves formed in the casting operation and the latter showing the completed grooves. As is well known in the art the metal adjacent to the surfaces ot' a casting is more dense, and in chill castings very milch harder than the metal at a greater depth. In finishing the rolls a considerable proportion oit the more durable metal is out away, and as the hardness and density due to chill- Specification of Letters Patent.

Application filed February 24, 1913.

Patented Sept. 2, 1 913.

Serial No. 750,284.

ing does not extend to any considerable depth the chilled metal will be entirely removed in one or two returnings ot the roll.

As fully described in an application for Letters Patent Serial No. 728,707, tiled October 30, 1912, a greater depth oit dense and chilled metal can be attained by causing a rapid reduction of the temperature not only ot the metal forming the surt'aces o of the sides and bottoms ot' the grooves 7 butI also ot' the metal relatively remote from the sur tace metal. This internal cooling of the metal intermediate oit the grooves 7 is et'- it'ected by means ot ringl 410, which is preterably :formed ot the same kind ot metal as the roll. '.lhe ring is arranged in proper position in the mold prior to the teeming ot' the molten metal, as tully described and claimed in the application referred to, and becomes incorporated in the body olf metal t3 adjacent to the groove.

ly properly proportioning the transverse dimensions ot the rings the entire body ot metal in the collars will be rendered dense and by making the internal peripheries ot the rings less than the periphery ot the bottoms ot the grooves, the inward and lateral extent. otl dense metal at the corners ot the groove is greatly increased.

l claim herein as my invention:

1. A grooved roll, having a metal ring incorporated within the periphery ot the collars or portions intermediate the grooves of the roll.

2. A grooved roll, having a metal ring incorporated therein adjacent to a groove, the inner periphery ot the ring being less than the periphery o't the roll at the bottom of the groove.

In testimony whereo't, I have hereunto set 85 my hand.

JOSEPH S. SIGAMAN, Jn. 1V itnesses Amon A. Tuna., Tiles. B. Joyce.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

